Murauski Anatoli, Chigrinov Vladimir, Muravsky Alexander, Yeung Fion Sze-Yan, Ho Jacob, Kwok Hoi-Sing
Institute of Applied Physics Problems, Minsk, Belarus.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jun;71(6 Pt 1):061707. doi: 10.1103/PhysRevE.71.061707. Epub 2005 Jun 21.
We propose a simple method for the determination of liquid-crystal (LC) polar anchoring energy by electrical measurements. The basic idea of this method is a two-channel scheme for capacitance measurements. The first channel uses one cell with a planar LC cell, while the second a LC cell with vertical alignment. One of the LC cells can have a high pretilt angle. The proposed method allows investigating anchoring properties of both planar and vertical aligned LC materials. Simultaneous measurements of the two cells compensate all volume effects in LC bulk and provide a good opportunity to study directly the LC-surface interaction. The method can be applied for LC cells, which do not have uniform azimuthal orientation. We used this method to investigate the polar anchoring properties of photoaligning material before and after illumination and for LC structures with a high pretilt angle.
我们提出了一种通过电学测量来测定液晶（LC）极性锚定能的简单方法。该方法的基本思想是一种用于电容测量的双通道方案。第一通道使用一个带有平面液晶盒的单元，而第二通道使用一个垂直取向的液晶盒。其中一个液晶盒可以具有较大的预倾角。所提出的方法能够研究平面取向和垂直取向的液晶材料的锚定特性。对两个液晶盒的同时测量补偿了液晶本体中的所有体积效应，并为直接研究液晶与表面的相互作用提供了良好的机会。该方法可应用于方位取向不均匀的液晶盒。我们使用此方法研究了光照前后光取向材料的极性锚定特性以及具有较大预倾角的液晶结构。
